A physician investigating unexplained hypercobalaminemia will typically order some combination of the following: Complete blood count (CBC) with differential to check for abnormal red blood cell, white blood cell, or platelet counts Liver function tests (ALT, AST, ALP, bilirubin, albumin) to assess liver health Kidney function tests (creatinine, BUN, estimated GFR) to evaluate renal clearance Peripheral blood smear if a myeloproliferative disorder is suspected Abdominal imaging (ultrasound or CT) if liver or abdominal pathology is a concern Cancer-specific markers or screenings if clinical suspicion warrants them The NIH Office of Dietary Supplements fact sheet notes that observational data from a Danish registry analysis of 757,185 people found the adjusted 1-year cancer risk was 1.74 to 4.72 times higher among those with B12 above 813 pg/mL compared to those in the normal range of 203 to 813 pg/mL

If you're concerned about methylcobalamin danger or interactions, speak to your physician
In some cases, if not related to breastfeeding, a milky discharge from the nipples might occur, indicating high prolactin levels
Healthy urine is typically clear or pale yellow, says Cleveland Clinic
The workings of B12 can be divided into five key areas: Synthesis of DNA the vitamin influences cell division and blood formation Energy metabolism B12 is vital for energy production in the mitochondria Lipid metabolism vitamin B12 is important for the building and maintenance of the cell membrane and myelin sheaths, a protector of the nerves in the central nervous system and brain Synthesis of hormones and neurotransmitters the vitamin is needed to produce crucial neurotransmitters and therefore influences mood, psyche and perceptions Detoxification homocysteine and cyanide are neutralised by B12, as well as radicals such as nitric oxide and peroxynitrite